Wilcoxon rank sum test

• For our problem, T=236.5, nA=18, nB=15


• Result is not statistically significant at 5%
  (P=0.05) level

No strong evidence to show that the difference in
waiting time for the two clinics are statistically
significant

0. 67

27. 66

  ^236.^5 ^255 

T

T

SE

z T 